Aim: Dementia is the major cause of disability among older persons and leading physical and psychological sequelae for both the person living with dementia (PLwD) and their caregivers. The aim of this study was to determine the prevalence of dementia in Malaysia and identify the factors influencing quality of life (QoL) of caregivers of PLwD.; Methods: A nationwide survey was conducted among individuals aged ≥60 years. Cognition was assessed with the Identification and Intervention for Dementia in Elderly Africans (IDEA) tool. QoL of older caregivers was assessed using the Control, Autonomy, Self-Realization and Pleasure (CASP-19) questionnaire.; Results: The prevalence of dementia among older adults aged ≥60 years in Malaysia was found to be 8.5%. The prevalence was found to be higher among females, those with no formal education and those in rural areas in Malaysia. The mean QoL of family caregivers of PLwD was significantly lower than the caregivers of older adults without dementia were (P < 0.001). Multivariable linear regression analysis on the subpopulation of PLwD showed that inability to carry out activities of daily living among PLwD (P = 0.014) and low to fair social support for the caregivers (P < 0.001) were negatively associated with QoL of caregivers of PLwD.; Conclusions: The high prevalence of dementia among older adults in Malaysia emphasizes the need for affirmative action in Malaysia. The functional capacity of the PLwD and social support determines the QoL of caregivers of PLwD in Malaysia. Thus, the community as a whole needs to provide support to PLwD and their caregivers.